If your income for the A.Y. 2012-13 after deducting all the deduction under chapter VIA. i.e. from 1.4.2011 to 31.3.2012 is below the exemption limit then you can claim refund.
Other wise consider the below criteria
Mr X has
A) Income is Rs. 180000 from Company A for 8 months in the Previous Year & Tax of Rs.1800 has been deducted and
B) Income is Rs. 60000 from company B is the same previous year for balanced period & no tax deducted .
And Mr. X has Rs. 65000 as eligible deduction under Chapter VIA then
Mr. Will have net income of Rs. 175000 (180000+60000-65000)
& can claim refund of Rs. 1800 which was deducted as TDS.
Further if Mr. X has Income from other sources of Rs. 75000 then the tax calculation will be as follows
Total Net Income = Rs. 250000 (180000+60000+75000-65000)
Tax on income = Rs.7210 (250000-180000) * 10.30%)
Less : TDS RS. (1800)
Net Tax Payable = Rs. 5410.